drm/omap: dsi: untangle ulps ops from enable/disable

Create a custom function pointer for ULPS and use it instead of
reusing disable/enable functions for ULPS mode switch. This allows
us to use the common disable/enable functions pointers for DSI.
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-28-tomi.valkeinen@ti.com

drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c

@@ -230,7 +230,7 @@ static int dsicm_enter_ulps(struct panel_drv_data *ddata)
 	if (r)
 		goto err;
 
-	src->ops->dsi.disable(src, false, true);
+	src->ops->dsi.ulps(src, true);
 
 	ddata->ulps_enabled = true;
 
@@ -255,7 +255,7 @@ static int dsicm_exit_ulps(struct panel_drv_data *ddata)
 	if (!ddata->ulps_enabled)
 		return 0;
 
-	src->ops->enable(src);
+	src->ops->dsi.ulps(src, false);
 	ddata->dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 
 	r = _dsicm_enable_te(ddata, true);
@@ -582,7 +582,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
 
 	dsicm_hw_reset(ddata);
 
-	src->ops->dsi.disable(src, true, false);
+	src->ops->disable(src);
 err_regulators:
 	r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
 	if (r)
@@ -608,7 +608,7 @@ static void dsicm_power_off(struct panel_drv_data *ddata)
 		dsicm_hw_reset(ddata);
 	}
 
-	src->ops->dsi.disable(src, true, false);
+	src->ops->disable(src);
 
 	r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies);
 	if (r)

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -4052,14 +4052,11 @@ static void dsi_display_uninit_dsi(struct dsi_data *dsi, bool disconnect_lanes,
 	}
 }
 
-static void dsi_display_enable(struct omap_dss_device *dssdev)
+static void _dsi_display_enable(struct dsi_data *dsi)
 {
-	struct dsi_data *dsi = to_dsi_data(dssdev);
 	int r;
 
-	DSSDBG("dsi_display_enable\n");
-
-	dsi_bus_lock(dsi);
+	WARN_ON(!dsi_bus_is_locked(dsi));
 
 	mutex_lock(&dsi->lock);
 
@@ -4075,25 +4072,29 @@ static void dsi_display_enable(struct omap_dss_device *dssdev)
 
 	mutex_unlock(&dsi->lock);
 
-	dsi_bus_unlock(dsi);
-
 	return;
 
 err_init_dsi:
 	dsi_runtime_put(dsi);
 err_get_dsi:
 	mutex_unlock(&dsi->lock);
-	DSSDBG("dsi_display_enable FAILED\n");
+	DSSDBG("dsi_display_ulps_enable FAILED\n");
 }
 
-static void dsi_display_disable(struct omap_dss_device *dssdev,
-		bool disconnect_lanes, bool enter_ulps)
+static void dsi_display_enable(struct omap_dss_device *dssdev)
 {
 	struct dsi_data *dsi = to_dsi_data(dssdev);
-
-	DSSDBG("dsi_display_disable\n");
+	DSSDBG("dsi_display_enable\n");
 
 	dsi_bus_lock(dsi);
+	_dsi_display_enable(dsi);
+	dsi_bus_unlock(dsi);
+}
+
+static void _dsi_display_disable(struct dsi_data *dsi,
+		bool disconnect_lanes, bool enter_ulps)
+{
+	WARN_ON(!dsi_bus_is_locked(dsi));
 
 	mutex_lock(&dsi->lock);
 
@@ -4107,6 +4108,31 @@ static void dsi_display_disable(struct omap_dss_device *dssdev,
 	dsi_runtime_put(dsi);
 
 	mutex_unlock(&dsi->lock);
+}
+
+static void dsi_display_disable(struct omap_dss_device *dssdev)
+{
+	struct dsi_data *dsi = to_dsi_data(dssdev);
+
+	DSSDBG("dsi_display_disable\n");
+
+	dsi_bus_lock(dsi);
+	_dsi_display_disable(dsi, true, false);
+	dsi_bus_unlock(dsi);
+}
+
+static void dsi_ulps(struct omap_dss_device *dssdev, bool enable)
+{
+	struct dsi_data *dsi = to_dsi_data(dssdev);
+
+	DSSDBG("dsi_ulps %d\n", enable);
+
+	dsi_bus_lock(dsi);
+
+	if (enable)
+		_dsi_display_disable(dsi, false, true);
+	else
+		_dsi_display_enable(dsi);
 
 	dsi_bus_unlock(dsi);
 }
@@ -4812,9 +4838,10 @@ static const struct omap_dss_device_ops dsi_ops = {
 	.connect = dsi_connect,
 	.disconnect = dsi_disconnect,
 	.enable = dsi_display_enable,
+	.disable = dsi_display_disable,
 
 	.dsi = {
-		.disable = dsi_display_disable,
+		.ulps = dsi_ulps,
 
 		.set_config = dsi_set_config,
 

drivers/gpu/drm/omapdrm/dss/omapdss.h

@@ -284,10 +284,9 @@ struct omap_dss_writeback_info {
 };
 
 struct omapdss_dsi_ops {
-	void (*disable)(struct omap_dss_device *dssdev, bool disconnect_lanes,
-			bool enter_ulps);
-
 	/* bus configuration */
+	void (*ulps)(struct omap_dss_device *dssdev, bool enable);
+
 	int (*set_config)(struct omap_dss_device *dssdev,
 			const struct omap_dss_dsi_config *cfg);